Rebates

Discrete Housing and a Small Footprint

Delivering 1000 watts of continuous power and 2000 watts peak, the QSC KSub extends your sound reinforcement system's bass range down to a chest-thumping 44 Hz. The KSub is plenty powerful for DJ rigs, pushing out a thundering 130 dB maximum SPL, while its attractive housing and small footprint make it perfect for houses of worship or upscale performance venues that need extra low-end punch in a low-profile cabinet. Plus, with four built-in casters and ergonomic handles for easy load-in, it's ideal for mobile PA setups. The KSub is stackable for use in larger venues or outdoor special events that require multiple subs -- and at just 14" x 26", a KSub can sit on its long side to fit under a stage riser in a small club or bar installation. The perfect match for QSC's K Series full-range loudspeakers, the powerful, flexible, and professional-looking KSub delivers maximum bang-for-buck among QSC's subwoofer offerings.

Simple Setup to Extend Your System's Low End

Not only is the KSub well-suited to diverse venues, but its setup couldn't be simpler. Plug in the stereo left and right outputs from your mixer or playback system to the KSub's combination XLR-1/4" line level inputs. The KSub's extremely steep, -24 dB/octave fourth-order low-pass filter will send frequencies below 100 Hz to its internal amplifier and dual 12" speaker drivers, while transparently passing the full-range program to its stereo balanced XLR line outputs. Simply plug these stereo outputs to your full-range system. Since it's designed to be an addition to your full-range speakers, the KSub includes a pole mount receptacle: just attach the included 35 mm threaded pole, and mount a full-range K-Series speaker on top for a wobble-free connection. Much sturdier than those top-heavy tripod-style speaker stands, the KSub is perfect when paired up with the QSC K8 in a "sub/satellite" configuration -- and it looks a lot classier for your banquet hall's PA system.

DEEP Mode: More Bass Output, Less Distortion

QSC K Series speakers are notable for their extensive onboard signal processing power, and the KSub is no exception. Flip a switch on the back of the KSub to engage DEEP mode -- Digital Extension and Excursion Processing. DEEP is QSC's exclusive technology for delivering low-frequency output without distortion. Much more than just a low-frequency EQ boost, DEEP employs sophisticated digital signal processing to identify and limit only the brief low-frequency transients that could potentially cause amplifier clipping distortion and over-excursion of the speaker cone. This virtually inaudible limiter allows the average output of the subwoofer to remain high. Even when DEEP is not in use, the KSub employs QSC's Guardrail technology to prevent clipping at the amplifier and cone over-excursion. The KSub's internal fan engages when its built-in amp senses high temperatures, and turns off automatically when not needed. These automatic protection measures ensure top performance from your subwoofer.

Active Loudspeaker Design for Safe Operation

Like the other loudspeakers in QSC's K Series, the KSub is an active, powered speaker with its own internal amplifier. Not only are powered speakers simpler to set up, they are inherently more robust than component systems with separate passive speakers and power amps. Power amps could potentially damage passive speakers if their impedance and wattage isn't properly matched, but with the K series, protection is built-in, and there's no need to worry about matching speakers to amps. Due to the nature of low-frequency sound, subwoofers require a lot of power; if the KSub were a passive speaker, it would need an enormous, power-hungry 2000-watt amplifier to safely push it. Luckily, the KSub is an active speaker with the amp built in -- an efficient, economical solution for adding serious low-end to your sound reinforcement system.

Product Description

The QSC K Series is quite simply the standard in lightweight powered loudspeaker systems. Under the direction of Pat Quilter, QSC's team of amplifier engineers have created upgraded Class D power modules unparalleled in the industry. Next, breaking from the traditional loudspeaker paradigm, every model is fitted with the identical 1.75 inch HF device (fullrange models) and woofers of the same high quality for unparalleled performance, regardless of speaker size.

Extensive DSP processing is employed throughout, providing levels of sonic clarity and total output that defy the system's size and weight.

Premium-grade materials, advanced construction processes and multiple mounting and suspension options allow for a wide range of live and installed applications.

Check out our exclusive demo of the QSC KSub Powered Subwoofer:

KSUB Inputs

Combo XLR and 1/4 inch TRS inputs accept both Mic and Line Level input. Up to three audio sources can be mixed internally and summed to a balanced output for "daisy-chaining" of multiple units. Separate direct outputs are also provided on each channel for additional output flexibility.

On-Board Options

On-board switches provide preset EQ settings. The HF setting (fullrange models) can be set to Vocal Boost for additional presence in the critical mid-frequency area or FLAT for accurate reproduction of the incoming signal. The LF switch can be set to Norm, DEEP(tm) for additional bass extension, or Ext Sub (fullrange models) for use with an external subwoofer. The rear panel LED switch can be set to Power, illuminating the front-mounted LED when the unit is powered on, Off for applications where it is not desirable to illuminate the front LED, or Limit which indicates to the system operator that the clip limiter circuit has been engaged during operation.

Fullrange models are housed in rugged ABS enclosures with a professional appearance that is at home in any application. ABS is a far more robust material than conventional speaker plastics and offers an additional measure of sonic clarity due to its internal rigidity. Ergonomic aluminum handles and a highly protective steel grille complete the package for ease of transport and long term durability.

The K Series fullrange models feature a unique Tilt-Direct(tm) pole cup mounting system. A simple turn of the dial engages a 7.5 degree downward tilt of the speaker allowing acoustic energy to be kept on the audience and off reflective surfaces for applications where maximum coverage from a high-positioned speaker is desired. Integrated M10 suspension points allow for suspended applications with a K Series M10 Kit (sold separately) or Yoke bracket (sold separately).

The KSub is a dual 12-inch bandpass design, constructed of premium birch and includes high-quality, low-noise casters. The subwoofer features a threaded pole receptacle for a positive, wobble free connection to a threaded speaker pole (included).

Remote gain control capability is offered via a potentiometer (not included) connected to the on-board Euroblock connector. In an installed application, multiple K Series speakers can be "daisy-chained" for total gain control from a single remote pot. Auto-standby mode is engaged after 5 minutes of inactivity.

zZounds has verified that this customer bought this product from us.
"KSub Just Awesome!!!"

Sound:
The sound is warm, tight and punchy.
Feature:
The features are very simple to use and easy to understand. You have two inputs and two outputs/thru connections. You can use one or two subs depending on your needs.
Ease of Use:
Just plug and play.
Quality:
The quality of the KSub is top notch.
Value:
For the amount of power, sound quality and small footprint the value is hard to beat.
Manufacturer Support:
Excellent customer support.
The Wow Factor:
They look sleek and professional. Compliments any room.
Overall:
I bought the KSubs for use with K Series speakers to complete my compact system. If you are looking for earth shaking bass then the KSub is not for you, although they come very close for 12"drivers. Set up right, coupled together the KSubs are awesome. The bass is warm, tight and punchy. Perfect for a 150 to 200 person event. You can even do outdoor events as long as you don't expect to shake the foundation. Subs are very important in any system to provide a full bodied sound. I use a sub for every gig, it provides better coverage and a fuller sound than just using two 15 inch full range speakers. Lets your full range speakers operate more efficiently without having to push them too hard. Your subs control all the bass and you control how much and how loud you want them. They really shine when you use them with a DBX DriveRack PX. Highly Recommended!

Thank you. Your vote has been counted. Could you briefly tell us why the review was or was not helpful?

zZounds has verified that this customer bought this product from us.
""K-boom""

Sound:
the QSC K-Sub is outstanding; although you don't need it with any K-series speakers, in my opinion; however, it enhances the sound quality if you do! A must for any mid-range or large gig!
Feature:
Easy to connect to any power speaker
Ease of Use:
Just plug and play; too easy to setup!
Quality:
Outstanding! Well built and protected
Value:
A little costly but well worth it. You won't be disappointed!
Manufacturer Support:
Haven't dealt directly with QSC; however, I received outstanding service from ZZounds, which is where I purchased the K-Sub! They have great support staff.
The Wow Factor:
Big and bulky but is easy to maneuver around because of the rollers attached
Overall:
Will keep this product for a while. Great addition to my other QSC K-series products

Our extended 45-Day 100% Satisfaction Guarantee applies on
this productBuy it, and if it isn't just right for you, return it!

What Our Customers Are Saying About zZounds "I have ordered from zZounds for several years and the service is always great! Any problems are few and far between and always taken care of instantly!" - Customer on January 8, 2015

A temporary customer reference number is assigned to each customer only while they are shopping on zZounds.com. If you call our customer service department for assistance, this number makes it easier for us to answer any questions you have about products, services or purchases.

close [x]Ground Shipment InformationDelivery time for in-stock items
Typically 3-5 business days from date of shipment.

A temporary customer reference number is assigned to each customer only while they are shopping on zZounds.com. If you call our customer service department for assistance, this number makes it easier for us to answer any questions you have about products, services or purchases.

1. zZounds offers the industry‘s most musician-friendly payment plans

zZounds offers a variety of Play as You Pay installment plans that allow you to get the gear you want today. While our competitors might offer house credit cards that require you to fill out an application and pass a credit check, our payment plans are easy to get, simple to use, and, best of all, accrue zero interest. Unlike those house credit cards that can leave you vulnerable to exorbitant interest charges once the promotional period ends, we never have and never will charge interest when you take advantage of one of the zZounds Play as You Pay plans.

2. zZounds guarantees the lowest price

Seen it for less somewhere else? Get it for less at zZounds. Simply click the “Seen it for less?” link on any product page and as long as we‘re not losing money, we‘ll beat any legitimate competitor‘s lowest price, usually within two hours. Want our best price even faster? Call us at 800-zZounds (800-996-8637), and we‘ll provide you with a lower price on the phone. Also, if you purchase from us and later find the product for less elsewhere, call or email us within 45 days, and we‘ll refund you the difference.

3. zZounds gets you your gear fast

At zZounds, you‘ll get your gear fast and, usually, with free delivery. Because we have warehouses in New Jersey, Nevada and Mississippi, nearly 95 percent of Americans reside within our two-day shipping zones. Combine this with the fact that many of our best-selling products qualify for free two-day delivery and you get expedited shipping without the additional cost.

4. zZounds makes returns super easy

Buy it, try it, like it, or return it to us for a full refund. It‘s just that simple. If you‘re not in love with what you bought, return it to zZounds within 45 days, and we‘ll promptly arrange for an exchange or a refund. No hassles. No hidden charges. And if a product‘s defective or damaged, call us at 800-zZounds (800-996-8637), and we‘ll email you a prepaid shipping label so you can easily return it to us at zero cost to you.

5. zZounds delivers top-rated customer service

zZounds has received multiple Bizrate® Circle of Excellence Platinum awards, placing us in the top 0.7 percent of Bizrate‘s network of 5,200 retailers. Our success in meeting the needs of our customers -- since 1996, we‘ve satisfied over 1,000,000 people -- is due in large part to the fact that zZounds only hires experienced musicians to answer your calls and emails, and they are never paid a commission.